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help please 4. (15 pts) A coin is tossed 6 times. Let X be the number of Heads on the first 4 tosses and Y

help please

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4. (15 pts) A coin is tossed 6 times. Let X be the number of Heads on the first 4 tosses and Y be the number of Heads on the last three tossed. Find the joint probabilities pij = P(X = i, Y = j) for all relevant i and j. Find the marginal probabilities pi+ and p+; for all relevant i and j

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